Submerged exhaust device for marine engines.



PATENTED APR. 24, 1906.

H N. GOODWINI 4 SUBMERGEDBXHAUST DEVICE EOE MARINE ENGINES.

APPLICATION FILED 11110.7. 1M5.

InEzentar;

witnesses UNITE STATES PATENT OFFICE.

HERBERT N. GOODWIN, OF-NEWBURY'PORT, MASSACHUSETTS;

SUBMERGED EXHAUST DEVICE FOR MARINE ENGINES. I

Specification of Letters Patent.

Patented April 24, 1906.

Application filed December 7, 1905. Serial No. 290,822.

The ordinary exhaust-pipe at present in common use for marinegasolene-engines eX- tends from the cylinder along the side of thevessel to a point near the stern, discharging the products of combustionabove the water, and thereby creating much noise, as well as avcrydisagreeable odor. To overcome these objections and to obtain apractical underwater exhaust-nozzle in which back pressure and noise areentirely avoided and which is simple, inexpensive, and can be readilyattached to the bottom of a vessel is the object of I ny invention.

The invention consists in an exhaust-nozzle adapted to be fastened tothe bottom of a boat and comprising inits construction a casing with apassage extending longitudinally therethrough, said passage consistingof an inlet-chamber and an outlet-chamber, said inlet-chamber having aninlet and an outlet orifice, said outlet-orifice being of substantiallysmaller area than said inleto'rifice and opening into saidrmtlet-chamber, said outletchamber provided with an outlet-orifice andwith an intermediate orifice opening there into adjacent to saidinlet-chamber outletorifice, said intermediate orifice adapted to beconnected to the exhaust of an engine.

The invention further consists in the combination and arrangement ofparts set forth in the following specification and particu'.

larly pointed out in the claims thereof.

It will be understood that in the device of my invention thelongitudinal passage is open to the water at both ends, so that the.water entering at the front end of said longitudinal passage is caused,by the forward movement of the vessel, to rush through said passage withgreat force and passing through said contracted portion forms a partialvacuum in the second passage, which assists the exhaust of the engine bysuction in said exhaust-pi pe, and the water passing through said longiridinal passage with great force carries with it I into the sea theproducts of combustion which pass down the exhaust-pipe or secondpassage into said longitudinal passage. The pressure of the gas at thedischarge-outlet is thus reduced to a minimum and the noise of theexhaust eliminated.

Referring to the drawings, Figure 1 is a sectional elevation of myexhaust-nozzle, the same being shown attached to a portion of the bottomof a boat. Fig. 2 is a front elevation of my improved nozzle, showingthe same attached to a portion of the bottom of a boat. 3 is anunderneath plan of the same. Fig. 4 is a horizontal section, partly inelevation, taken on line A A of Fig. 1.

Like letters of reference refer to like parts throughout the severalviews of the drawings.

In the drawings, a represents a I ortion of the bottom of a boat orvessel to w ich is attached my improved exhaust-nozzle b by means ofbolts 0 c. Said exhaust-nozzle consists of a casing d, havingalongitudinal passage 6 extending horizontally therethrough andconsisting of an inlet-chamber f and an outlet-chamber g. Saidinlet-chamber is provided with an inlet-orifice h and an outlet-orificei, said outlet-orifice being of substantially smaller area than saidinlet-orifice and opening into said outlet-chamber g. The outletchamberg is also provided with an outlet orifice k and with an intermediateorifice Z, which opens into said'outlet-orifice adjacent to the orificei, said intermediate orifice constituting an outlet-orifice of a secondpassage m, extending through the upwardly and fonwardly extending curvedportion n of the easing (1. The upper end of the curved portion n isscrew-threaded, inorder toada t the same tobe readily connected with '01e exhaust-pipe of an engine located in the vessel or boat a.

It will-be understoodthat the inlet-orifice it opens toward the front ofthe vessel, while the outlet-orifice it opens toward the stern of thevessel.

A flange 0 extends around the casing (1, through which the bolts 0 eXted and by which said casing is clamped or astened to the bottom of thevessel.

It will be noted that the inlet-chamber f is conical or funnel-shaped,the walls thereof converging toward each other from the inletorifice hto the outlet-orifice 01 thereof, thus forming in the longitudinalpassage e a contracted portion between the inlet-orifice h and theoutlet-orifice'k thereof, while the secnd passage '01. opens into theoutlet-chamber g or into the longitudinal passage e adjacent to theoutlet-orifice i and between the inlet of said longitudi nal passage.With the exception of this contracted portion, therefore, the water hasan unobstructed passage from the front'of the longitudinal passage 6 tothe rear or outlet orifice 1c of said passage, and as the vessel movesforwardly in the direction of the arrow p a powerful rush ofwaterthrough said passage from the front'to the rear thereof is obtained,which causes the vacuum hereinbefore referred 'to at the outlet Z of thesecond passage m and carries with it the products of combustion passingdown the vertical curved pipe a, cooling the same and at the same timereducing the pressure of gas at the outlet-orifice to a nlnimuin,thereby avoiding back pressure in the engine, as well as noise and thedisagreeable odor produced where the products of combustion aredischarged above the surface of the Water. The tunnel shape of theinlet-chamber f also tends to increase the force of the stream orcurrent of water as it passes the lower end of the curved portion n orof the outlet-orifice l of the second passage m, and thus this conicalconstruction of the inlet-chamber increases the vacuum and the downwardsuction through the second passage m. g

The waste water from the jacket surrounding the engine-cylinder may beadvantageously led into and discharged through the exhaust-pipe n, as itwill serve to contract the volume of escaping gases and still furtherreduce the pressure at the discharge-outlet. By extending theexhaust-pipe directly down from the engine through the bottom of thevessel instead of along the side of the same the objectionable heathitherto radiated from the said outwardly-exposed exhaust-pipe isentirely avoided.

follows Assuming the boat to be moving forward or in the direction! ofthe arrow p, the water will pass into the inlet-chamber f in thedirection of the arrow 1. The water passes through theinlet-chamberf andthrough the caused by the difference in temperature between the coldwater which enters from the and the hot gases which pass rough thesecond passage m inlet-chamber downwardly t The operation of my improveddevice is as and also by the velocity of the water which passes from theinlet-chamberf through the contracted outlet-orifice i, into theoutletchamber g.

Having thus described my invention, what T claim, and desire by LettersPatent to secure, 1s I I 1. An exhaust-nozzle adapted to be fastened tothe bottom of ,a boat comprising in its construction a casing providedwith a passage extending longitudinally therethrough, said passageconsisting of an inlet-chamber and an outlet-chamber, said inlet-chamberhaving an inlet and an outlet orifice, said outvlet-orifice being ofsubstantially smaller area than said inlet-orifice and opening into saidoutlet-chamber, said outlet-chamber provided with an outlet-orifice andwith an intermediate orifice opening thereinto adjacent to saidinlet-chamber outletorifice, said intermediate orifice adapted to beconnected to the'exhau'st of an engine.

2. Anexhaust-nozzle adapted to be fastened to the bottom of a boatcomprising in its construction a casing provided with a pas.- sageextending longitudinally therethrough, said passage consisting of aninlet-chamber and an outlet-chamber, said inlet-chamber having an inletand an outlet orifice, said outlet-orifice being of substantiallysmaller area than said inlet-orifice and opening into saidoutlet-chamber, said outlet-chamber provided with an outlet-orifice,said casing provided with a second passage opening into saidoutlet-chamber adjacent to said inletchamber outlet-orifice and adaptedto be] connected to the exhaust of an engine.

3. In combination, a boat and an exhaustnozzle fast to the exterior ofthe bottom of said boat, said nozzle comprising in its construction acasing provided with a passage,

extending longitudinally therethrough, said a passage consisting of aninlet-chamber and an outlet-chamber, said inlet-chamber having an inletand an outlet orifice, said outlet: orifice of substantially smallerarea than said inlet-orifice and opening into said outletchamber, saidinlet-chamber opening toward the bow of said boat, said outlet-chamberprovided with an outlet-orifice, said casing provided with a secondpassage opening into said outlet-chamber adjacent to said inletchamberoutlet-orifice, said second passage extending into said boat and adaptedto be connected to the exhaust of an engine.

4. An exhaust-nozzle adapted to be fastened to the bottom of a boatcomprising in its construction a casing provided with a passageextending longitudinally therethrough, said passage consisting of aninlet-chamber and an outlet-chamber, said inlet-chamber having an inletand anoutlet orifice, said outlet-orifice being of substantially smallerarea than said inlet-orifice, said inlet-chamber eonvergin from saidinlet-orifice toward said In testimony whereof I have henennto setoutlet-orifice, said inlet-chamber outlet-orimy hand in presence of tw'esubscribing wit- 1o flee-opening into said outlet-chamber, said nesses.

outlet-chamber provided with an ontlet-ori- 5 fice and with anintermediate orifice opening HERBERT (IOODWIN' therein'to adjacent tosaid inlet-chamber out- Witnesses:

let-orifice, said intermediate orifice adapted CHARLES S; GOODING,

to be connected to the exhaust of an engine. ANNIE J. DAILEY.

